<template>
	<view>
		<view class="search-box">
			<uni-search-bar @input="input" :radius="100" cancelButton="none" />
			<!-- <uni-search-bar @input="input" :radius="100" cancelButton="none"></uni-search-bar> -->
		</view>
		<!-- 搜索建议列表 -->
		<view class="sugg-list" v-if="searchResults.length !== 0">
			<view class="sugg-item" v-for="(item, i) in searchResults" :key="i" @click="gotoDetail(item.goods_id)">
				<view class="goods-name">{{item.goods_name}}</view>
				<uni-icons type="arrowright" size="16" ></uni-icons>
			</view>
		</view>
		<!-- 搜索历史 -->
		<view class="history-box" v-else>
			<!-- 标题区域 -->
			<view class="history-title">
				<text>搜索历史</text>
				<uni-icons type="trash" size="17" @click="clean"></uni-icons>
			</view>
			<view class="history-list">
				<uni-tag :text="item" v-for="(item, i) in histories" :key="i" @click="gotoGoodsList(item)"></uni-tag>
			</view>
		</view>
	</view>
	
</template>

<script>
	export default {
		data() {
			return {
					timer: null,
					kw:'',
					//搜索的结果列表
					searchResults:[],
					//搜索历史的数组
					historyList: []
			};
		},
		onLoad() {
			this.historyList = JSON.parse(uni.getStorageSync('kw') || '[]')
		},
		methods:{
			//input 输入事件
			input(e) {
				 clearTimeout(this.timer)
				 this.timer = setTimeout(() => {
					// console.log(e)
					 this.kw = e
					console.log(this.kw)
					this.getSearchList()
				 }, 500)
			},
			async getSearchList() {
				//判断搜索关键词是否为空
				if (this.kw === '') {
					this.searchResults = []
					return
				}
				const {
					data: res
				} = await uni.$http.get('/api/public/v1/goods/qsearch', {
					query: this.kw
				})
				if (res.meta.status !== 200) return uni.$showMsg()
				this.searchResults = res.message
			
				this.saveSearchHistory()
			},
			gotoDetail(goods_id) {
				uni.navigateTo({
					url: '/subpkg/goods_detail/goods_detail?goods_id=' + goods_id
				})
			},
			saveSearchHistory() {
				 // this.historyList.push(this.kw)
			 	const set = new Set(this.historyList)
			 	set.delete(this.kw)
			 	set.add(this.kw)
			
			
			 	this.historyList = Array.from(set)
			//对搜索历史数据，进行持久的存储
			 	uni.setStorageSync('kw', JSON.stringify(this.historyList))
			
			},
			clean() {
				this.historyList = []
				uni.setStorageSync('kw', '[]')
			},
			gotoGoodsList(kw){
				uni.navigateTo({
				    url: '/subpkg/goods_list/goods_list?query=' + kw
				  })
			}
		},
		computed: {
			histories() {
				return [...this.historyList].reverse()
			}
		}
	}
</script>

<style lang="scss">
	.search-box {
		position: sticky;
		top: 0;
		z-index: 999;
	}
	.sugg-list {
		padding: 0 5px;
	
		.sugg-item {
			font-size: 12px;
			padding: 13px 0;
			border-bottom: 1px solid #efefef;
			display: flex;
			align-items: center;
			justify-content: space-between;
	
			.goods-name {
				white-space: nowrap;
				overflow: hidden;
				text-overflow: ellipsis;
				margin-right: 3px;
			}
		}
	}
	.history-box {
		padding: 0 5px;
	
		.history-title {
			display: flex;
			justify-content: space-between;
			align-items: center;
			height: 40px;
			font-size: 13px;
			border-bottom: 1px solid #efe7e0;
		}
	
		.history-list {
			display: flex;
			flex-wrap: wrap;
	
			.uni-tag {
				margin-top: 5px;
				margin-right: 5px;
			}
		}
	}
</style>
